If mDOC = 44 degrees and mCOB = 80 degrees, find the measure of the indicated arc in circle O. mDB=?

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Does anyone know how to do geometryme with this problem

Standard deviation of 19,29,21,22,23